Examine source code of Random Palette Background

{
  "manifest_version": 2,
  "name": "Random Palette Background",
  "version": "1.0",
  "description": "Overrides the New Tab page with an abstract background generated from random color palettes.",
  "permissions": [
    "storage"
  ],
  "chrome_url_overrides": {
    "newtab": "newtab.html"
  },
  "browser_action": {
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{e87ffb0d-1756-47b8-a045-0c78f633de24}"
    }
  }
}